I know this is basic question but please understand that this is my first time to learn grasshopper.
I would like to know how to divide only 2 surfaces of the box.
I am thinking of high-rise building consisting of 4 bundled tubes with braces for my final project. Two surfaces of each tube face other tubes and only two surfaces of each tube have braces.
How can I select only 2 surfaces (for example south and east facade) and divide them?